To rely on reproducible results by mass spectrometry proteomics from several sources, we focused on 66 RBPs that exhibited differential expression in more than one comparison (CRPC vs. PC in the Latonen dataset, MET vs. Loc in the Iglesias‐Gato dataset, and primary cancers with or without BCR in the Sinha dataset). Here, BCR is linked to pachyonychia congenita.